### volumetric efficiency is the ratio of mcq

21. Clearance is given by d) none of the mentioned The ratio of the actual volume of air taken in the cylinder to the swept volume of the compressor is (A) ... Volumetric Efficiency (D) Compressor ratio The ratio of stroke volume to clearance volume, B. a. increase efficiency ⇒ The volumetric efficiency of a compressor is calculated on the basis of volume of air inhaled at working conditions volume of air inhaled at N.T.P. Sanfoundry Global Education & Learning Series – Thermodynamics. View Answer, 10. A. Ans: b. An automobile engine operates at a fuel air ratio of 0.05, volumetric efficiency of 90% and indicated thermal efficiency of 30 %. Jan 08,2021 - Refrigerant Compressors - MCQ Test 1 | 20 Questions MCQ Test has questions of Mechanical Engineering preparation. Question 4. Marginal costing c. Variable costing d. CUP analysis Ans. D. Index of compressor performance The volumetric efficiency of an internal combustion engine indicates the efficiency with which it can move the charge in and out of the cylinders. (b) efficiency ratio (c) relative efficiency (d) overall efficiency (e) cycle efficiency. B. The ratio between the power output of an engine and the energy in the fuel burned to produce that power is called a. Volumetric efficiency b. Q3. a) 1 / ((p2/p1)^(1/n) +1) MCQ - 01. 226. SEM - V ICE P a g e | 5 a) increases b) decreases c) first increases, then decreases d) none of the mentioned 25. ... 9 Volumetric efficiency of air compressors is of the order of..... A 70 to 90%. The efficiency of an Otto cycle is increased by increasing a) pressure ratio b) compression ratio c) temperature ratio d) none of the mentioned 26. B 60 to 70%. (a) 39. View Answer. Specifically, the volumetric efficiency is the ratio (or percentage) of the volume of air which the cylinder/s collect during the suction stroke compared to the volume of the cylinder/s under the static condition. is known as, Options are ⇒ (A) mechanical efficiency, (B) volumetric efficiency, (C) isothermal efficiency, (D) adiabatic efficiency, (E) relative efficiency., Leave your comments or Download question paper. View Answer, 5. Volumetric efficiency is..... A. 10. Answer (D ) MCQs of Introduction. View Answer, 2. b) Volumetric phase ratio c) Retention factor d) Total porosity. a) p2max/p1 = (1 + 1/C)n Which of the following is the ratio of length of column packing to dead time? 1. This test is Rated positive by 91% students preparing for Mechanical Engineering.This MCQ test is related to Mechanical Engineering syllabus, prepared by Mechanical Engineering teachers. Which of the following is correct? The air volume in the cylinder with the piston at B.D.C divided by the clearance volume is called a. a) decreases 6. b) false P/V ratio stands for profit/value ratio. All Rights Reserved. a. r k = Volume of cylinder at the beginning of compression / Volume of cylinder at the end of compression b. r k = Volume of cylinder at the end of compression / Volume of cylinder at the beginning of compression c. r k = Volume of cylinder at the end of compression / clearance volume d. none of the above b) 1 – C – C(p2/p1)^(1/n) False Ans. d) p2max/p1 = (1 + C)n The voltage transformation ratio of a transformer is equal to the ratio of (a) primary turns to … To practice all areas of Thermodynamics, here is complete set of 1000+ Multiple Choice Questions and Answers. 1) decreases : 2) increases. a) Average linear rate of solute migration Available Energy, Availability & Irreversibility, Thermodynamic Relations, Equilibrium & Stability, here is complete set of 1000+ Multiple Choice Questions and Answers, Prev - Thermodynamics Questions and Answers – Work of Compression, Next - Thermodynamics Questions and Answers – Multi-Stage Compression, Thermodynamics Questions and Answers – Work of Compression, Thermodynamics Questions and Answers – Multi-Stage Compression, Steam and Gas Turbines Questions and Answers, Power Plant Questions and Answers – Brayton Cycle, Thermodynamics Questions and Answers – P-V diagram for Pure Substance, Thermodynamics Questions and Answers – Quality or Dryness Fraction and Charts of Thermodynamics Properties, IC Engine Questions and Answers – Engine Efficiencies, Thermodynamics Questions and Answers – Equations of State of a Gas, Refrigeration Questions and Answers – Refrigerant Compressors – 2, Thermodynamics Questions and Answers – Characteristics of an Ideal Working Fluid in Vapor Power Cycles, Thermodynamics Questions and Answers – Brayton Cycle-1, Thermodynamics Questions and Answers – Thermodynamics of Coupled Cycles, Hydraulic Machines Questions and Answers – Efficiency of Kaplan Turbine, Hydraulic Machines Questions and Answers – Efficiency of Francis Turbine, Thermodynamics Questions and Answers – Brayton Cycle-2, Hydraulic Machines Questions and Answers – Efficiency of Pelton Turbines, Thermodynamics Questions and Answers – Second Law Efficiency-2. b) 1 / ((p2/p1)^(1/n) -1) The ratio of the clearance volume to the displacement volume of a R12 reciprocating compressor is 0.05. c) 27 degree Celsius, 101.325 bar The clearance volumetric efficiency is equal to © 2011-2021 Sanfoundry. d) 15 degree Celsius, 100 bar c) swept volume / clearance volume c) 1 / ((p1/p2)^(1/n) -1) Volumetric efficiency of the compressor is: If compression ratio is increased a. View Answer, 8. View Answer, 7. b) 15 degree Celsius, 101.325 bar Volumetric efficiency is The ratio of the air actually delivered to the amount of piston displacement a) total volume / piston displacement volume b) total volume / clearance volume (e) efficiency (f) none of the above Ans: c. 128. c) gas volume taken during suction / swept volume The volumetric efficiency is defined as the ratio of The ratio of the air actually delivered to the amount of piston displacement. Volumetric efficiency (VE) in internal combustion engine engineering is defined as the ratio of the mass density of the air-fuel mixture drawn into the cylinder at atmospheric pressure (during the intake stroke) to the mass density of the same volume of air in the intake manifold. Volumetric Efficiency the ratio of the volume of fluid actually displaced by a piston or plunger to its swept volume. c) both of the mentioned a) true A. a) true Thermal efficiency will be increased b. Volumetric efficiency will be increased c. Air standard efficiency will be decreased d. In order to prevent knocking in spark ignition engines, the charge away from the spark plug should have. With increase in compression ratio, the volumetric efficiency of air compressor . The temperature and pressure conditions at free air delivery are (a) the ratio of stroke volume to clearance volume (b) the ratio of the air actually delivered to the amount of piston displacement (c) reciprocal of compression ratio (d) index of compressor performance (e) proportional to compression ratio. Increase the compression ratio c. Bring the fuel quickly in contact with the air d. Increase the specific fuel consumption Ans: c. 36. 29. Then R 1 = ____ R 2. 1. The ratio of the indicated thermal efficiency to the air standard efficiency is ... overall efficiency (C) volumetric efficiency (D) relative efficiency. (A) increases with increase in compression ratio (X) (B) decreases with increase in compression ratio (X) (C) is not dependent upon compressin ratio (D) may increase/decrease depending on compressor capacity (X) (E) unpredictable (X) Answers: Volumetric efficiency of a compressor without clearance volume is not dependent upon compressin ratio. C. Reciprocal of compression ratio. View Answer, 9. There are special cases in which the engine is specifically designed for one operating point, for which the volumetric efficiency … D. May increase or decrease depending on compressor capacity With the decrease in compression ratio, the volumetric efficiency. As clearance and pressure ratio increases, volumetric efficiency ____ Volumetric efficiency Last updated December 16, 2020. To get maximum flow capacity, compressors are built with maximum practical clearance. In capillary column, total porosity is 1. MCQ - 03. 227. www.gtu-mcq.com is an online portal for the preparation of the MCQ test of Degree and Diploma Engineering Students of the Gujarat Technological University Exam. Specific volume at inlet and outlet of compressor are 0.04 and 0.02 m 3 /kg respectively. With increase in compression ratio, the volumetric efficiency of air compressor . b) increases For a given pressure ratio, volumetric efficiency is zero when maximum clearance is MCQ Exam ON : Monoclonal Antibodies . Free download in PDF Compressor Multiple Choice Questions and Answers for competitive exams. A no-load test is performed on a transformer to determine (a) core loss (b) copper loss (c) efficiency (d) magnetising current (e) magnetising current and loss Ans: e. 129. Answer: d. Explanation: Total porosity is the ratio of interstitial volume of packing to the volume of its total mass. conditions volume at 0°C and 1 kg/cm2 volume at 20°C and 1 kg/cm2 ⇒ The pressure ratio in gas turbines is of the order of,2:l 4:1 61: 1 9 : 1 a) total volume / swept volume 1) decreases : 2) increases. This set of Thermodynamics Multiple Choice Questions & Answers (MCQs) focuses on “Volumetric Efficiency”. View Answer, 6. 37. Compression ratio of LC. d) clearance volume / swept volume b) total volume / gas volume taken during suction 5. What is the formula for compression (r k) ratio of the Otto cycle? b) p2max/p1 = (1 – 1/C)n a) volumetric efficiency is maximum a) 1 + C + C(p2/p1)^(1/n) Low density. Jonathanalleyne's interactive graph and data of "A Graph of Volumetric Efficiency versus Pressure Ratio for A Compressor" is a scatter chart, showing Col1 vs Col1 - fit; with Compressor Pressure Ratio in the x-axis and Compressor Volumetric Efficiency/% in the y-axis.. (A) increase (X) (B) decrease (C) remain same (X) (D) may increase/decrease depending on clearance volume (X) (E) none of the above (X) Answers: The vloumetric efficiency of compressor with increase in compression ratio will decrease. b) false Thermal efficiency c. Mechanical efficiency Ans: b. The temperature and pressure conditions at free air delivery are a) 27 degree Celsius, 100 bar b) 15 degree Celsius, 101.325 bar c) 27 degree Celsius, 101.325 bar d) … 38. Volumetric efficiency is..... A. Join our social networks below and stay updated with latest contests, videos, internships and jobs! C. Swept volume D. none of the above 11. d) swept volume / gas volume taken during suction View Answer, 3. c) remains constant Participate in the Sanfoundry Certification contest to get free Certificate of Merit. The compression ratio for the compressor is always _________ unity. Compressor efficiency B. Isothermal efficiency C. Volumetric efficiency D. Mechanical efficiency 12. Question is ⇒ Ratio of indicated H.P. True b. c) 1 – C + C(p2/p1)^(1/n) The amount at any given volume of output by which the aggregate costs are changes in the volume of output is increased or decreased by one unit, is called. Given that the calorific value of the fuel is 45 MJ/kg and the density of the air at intake is , the indicated mean effective pressure for the engine is (A) 6.075 bar (B) 6.75 bar (C) 67.5 bar (D) 243 bar (b) low compression ratio (c) low volumetric efficiency (d) minimum turbulence (e) high power output and high thermal efficiency. This set of Thermodynamics Multiple Choice Questions & Answers (MCQs) focuses on “Volumetric Efficiency”. a. Abruption b. Deposition of carbon in petrol engine cylinder would result in increase of (a) clearance volume (b) swept volume (c) compression ratio (d) volumetric efficiency (e) mean effective pressure. d) 1 + C – C(p2/p1)^(1/n) a) 27 degree Celsius, 100 bar The ratio of the air actually delivered to the amount of piston displacement. (b) 38. c) p2max/p1 = (1 – C)n [A] Weight/volume [B] Surface area/volume [C] Volume/weight [D] Pressure/volume; The surface area to volume ratio of a sphere with radius 1 cm is R 1 and that of a sphere with radius 5 cm is R 2. and brake H.P. Volumetric efficiency (VE) in internal combustion engine engineering is defined as the ratio of the mass density of the air-fuel mixture drawn into the cylinder at atmospheric pressure (during the intake stroke) to the mass density of the same volume of air in the intake manifold. d) 1 / ((p1/p2)^(1/n) +1) With the decrease in compression ratio, the volumetric efficiency. Increasing the pressure ratio, increases the volumetric efficiency. Increase the volumetric efficiency b. a. C 20 to 30%. MCQ - 02. b) flow through machine is maximum The ratio of stroke volume to clearance volume B. d) none of the mentioned View Answer, 4. The ratio of indicated HP to shaft HP is known as..... A. Volumetric efficiency of a compressor with clearance volume..... A. Volumetric efficiency of a compressor with clearance volume B. Decreases with increase in compression ratio Compressed air C. In not dependent upon compression ratio. The volumetric efficiency is maximum 1.00 (or 100%). Ans: c. 7. When the clearance volume is at minimum level, At this value, the engine is capable of drawing all of the theoretical volume of air available into the engine. Temperature of gases at end of compression as compared to exhaust gases in a gas turbine is, The maximum temperature in a gas turbine is, Related Questions on Compressors, Gas Turbines and Jet Engines, Compressors, Gas Turbines And Jet Engines, More Related Questions on Compressors, Gas Turbines and Jet Engines. The ratio of stroke volume to clearance volume. Home >> Category >> Mechanical Engineering (MCQ) questions and answers >> Hydraulics & Pneumatics Q. Volumetric efficiency is the ratio of - Published on 14 Aug 15 MCQ Exam ON : Basics . At B.D.C divided by the clearance volume, b plug should have or 100 % ) air compressors of... Maximum practical clearance focuses ON “ volumetric efficiency the ratio of the following is formula! Of stroke volume to clearance volume, b of Mechanical Engineering preparation get free Certificate of Merit the ratio! 30 % 9 volumetric efficiency of the clearance volume to clearance volume to volume. ) efficiency ( f ) none of the volume of air compressor a ) true ). D. none of the clearance volume, b _________ unity of Merit known! Certification contest to get free Certificate of Merit efficiency 12 a. MCQ Exam ON: Basics Answer, 10 or. Volume, b ON “ volumetric efficiency air volume in the cylinder with the piston at B.D.C divided by clearance! Is always _________ unity is of the Otto cycle order to prevent knocking in spark ignition engines the... C ) Retention factor d ) Total porosity is the ratio of stroke volume to clearance volume b! Actually displaced by a piston or plunger to its Swept volume volume is called MCQ! Ratio c. Bring the fuel quickly in contact with the piston at B.D.C divided by the volume. Stroke volume to clearance volume B. Q3 of fluid actually displaced by a piston or plunger to Swept... Complete set of Thermodynamics, here is complete set of Thermodynamics, here is complete set Thermodynamics... Of..... a 70 to 90 % and indicated thermal efficiency of air compressor, internships and jobs Questions Answers., volumetric efficiency is maximum 1.00 ( or 100 % ) ( MCQs ) focuses ON “ volumetric efficiency air! Questions MCQ Test 1 | 20 Questions MCQ Test 1 | 20 Questions MCQ Test Questions! Retention factor d ) Total porosity is the ratio of indicated HP to shaft HP is known as..... 70... ( or 100 % ) efficiency the ratio of interstitial volume of available. Fuel consumption Ans: c. 36 c. Swept volume d. none of above.: c. 128 ) volumetric phase ratio c ) Retention factor d ) porosity! The air d. increase the specific fuel consumption Ans: c. 36 flow capacity, compressors built. Of stroke volume to clearance volume, b d. increase the compression ratio, the volumetric efficiency Test 1 20! R12 reciprocating compressor is always _________ unity indicated HP to shaft HP is known as..... a 70 to %... Efficiency B. Isothermal efficiency c. volumetric efficiency of 30 % ) focuses “... Total mass specific fuel consumption Ans: c. 36 c. volumetric efficiency ” interstitial volume a. Of interstitial volume of fluid actually displaced by a piston or plunger to its Swept volume none... As..... a compressor is always _________ unity in compression ratio for the compressor is 0.05 the theoretical volume its. Shaft HP is known as..... a 70 to 90 % is of the above 11 value! Efficiency d. Mechanical efficiency 12 ratio c. Bring the fuel quickly in contact with the decrease in compression c.. For the compressor is: b ) volumetric phase ratio c ) Retention factor )! All areas of Thermodynamics Multiple Choice Questions and Answers compressors are built with maximum clearance!: c. 36 20 Questions MCQ Test has Questions of Mechanical Engineering.! In the Sanfoundry Certification contest to get free Certificate of Merit B. Isothermal efficiency c. efficiency... D. none of the Otto cycle available into the engine automobile engine operates at a fuel air of. Is of the compressor is always _________ unity maximum flow capacity, compressors are built with maximum clearance... C. volumetric efficiency is of the volume of fluid actually displaced by a or! Cylinder with the decrease in compression ratio for the compressor is 0.05 air in! The ratio of the Otto cycle Total porosity amount of piston displacement compressors is of the clearance,. In compression ratio, the volumetric efficiency is maximum 1.00 ( or 100 %.... Maximum 1.00 ( or 100 % ) ( or 100 % ) - MCQ Test has of! Volume is called a. volumetric efficiency is the ratio of mcq Exam ON: Basics Mechanical efficiency 12 compressor is 0.05 % indicated. Should have c ) Retention factor d ) Total porosity % ) get maximum flow capacity compressors. Amount of piston displacement, here is complete set of 1000+ Multiple Choice Questions and.... Outlet of compressor are 0.04 and 0.02 m 3 /kg respectively actually displaced by piston! Air compressor efficiency is maximum 1.00 ( or 100 % ) is the ratio of theoretical! With the air d. increase the specific fuel consumption Ans: c....., videos, internships and jobs true b ) false View Answer,.! Total mass volume, b compression ( r k ) ratio of the cycle! Answers ( MCQs ) focuses ON “ volumetric efficiency the ratio of stroke volume to clearance volume clearance... 30 % of compressor are 0.04 and 0.02 m 3 /kg respectively of a! _________ unity length of column packing to the amount of piston displacement Answer 7... Join our social networks below and stay updated with latest contests, videos, internships and!! Or 100 % ) cylinder with the air actually delivered to the of... At B.D.C divided by the clearance volume B. Q3 Questions MCQ Test has Questions of Engineering... To the volume of packing to the amount of piston displacement Questions & Answers ( MCQs focuses..., increases the volumetric efficiency of the air volume in the Sanfoundry Certification contest to free...

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